Vivotek NETWORK CAMERA IZ7151 - Manual (Page 46)

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 - User's Manual
be needed for data transmission� Therefore, if Constant bit rate is selected, the bandwidth
utilization is fixed at a selected level, resulting in mutable video quality performances� The
bit rates are selectable at the following rates: 20Kbps, 30Kbps, 40Kbps, 50Kbps, 64Kbps,
128Kbps, 256Kbps, 512Kbps, 768Kbps, 1Mbps, 2Mbps, 3Mbps and 4Mbps�
On the other hand, if Fixed quality is selected, all frames are transmitted with the same quality;
bandwidth utilization is therefore unpredictable� The video qualities are selectable at the
following settings: Medium, Standard, Good, Detailed and Excellent�
If JPEG mode is selected, the Network Camera continuously sends JPEG images to the clients,
producing dynamic effects similar to movies� Every single JPEG image transmitted guarantees
the same image quality, which in turn comes at the expense of variable bandwidth usage� And
because the media contents are a combination of JPEG images, no audio data is transmitted to
the clients�
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Frame size
Select the video size� Note that a larger frame size takes up more bandwidth� The frame sizes
are selectable in the following resolutions: 176 x 144, 320 x 240 and 640 x 480�
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Maximum frame rate
This limits the maximal refresh frame rate per second� Set the frame rate higher for a smoother
video quality�
If the power line frequency is set to 50Hz, the frame rates are selectable at the following rates:
1fps, 2fps, 3fps, 5fps, 8fps, 10fps, 15fps, 20fps and 25fps� If the power line frequency is set to
60Hz, the frame rates are selectable at the following rates: 1fps, 2fps, 3fps, 5fps, 8fps, 10fps,
15fps, 20fps, 25fps and 30fps�
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Video quality
The video qualities are selectable at the following settings: Medium, Standard, Good, Detailed
and Excellent�
NOTE :
► Before creating a privacy mask window, make sure the zoom operation is not activated.
► In a privacy mask window, motion detection will not take effect.